Ingredients

Method

Heat oil in a large skillet over medium-high. Cook onion and garlic, stirring occasionally, until onion is translucent and golden brown around the edges, 8–10 minutes.

Add chipotle chile, adobo sauce, and tomato paste and cook, stirring, until they are slightly darkened, about 3 minutes. Add tomatoes; cook, stirring, until liquid is slightly thickened, about 5 minutes; season with salt and pepper.

Let cool slightly, then transfer to a blender. Add vinegar and molasses and blend until smooth; taste, and season with salt and pepper.

DO AHEAD: Salsa can be made 1 day ahead. Cover and chill.